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Additional Chemistry - Topics 7 & 8

Mr R Anderson

A crossword to help with revision of Edexcel 360 Additional Chemistry Topic 7 and 8.

1
 
2         3         4  
  5                    
     
6                         7      
        8  
            9
  10                        
           
    11 12                              
           
      13         14            
           
  15                                     16  
             
             
17          
           
18                      
         
       
19                                
     
    20                        

Across
2.A reaction that gives out more energy than it took in.
5.The point at which forward and backward rates of reaction are equal.
6.Extremely small cylinders of rolled up graphene sheets (single layers from graphite). (2 Words)
10.Increasing this will increase the yield of ammonia produced by the method marked (*).
11.When particles collide they will only react if they have at least this. (2 Words)
13.A method (*) of producing ammonia from nitrogen and hydrogen. (2 Words)
15.A molecular form of pure carbon, where each molecule contains 60 carbon atoms.
18.A substance that will speed up a chemical reaction but will not get used up during the reaction.
19.The type of structure that leads to small individual units such as in water or methane. (2 Words)
20.The type of structure formed by carbon and silicon in particular. (2 Words)
Down
1.The percentage of mass from the reactants that ends up in the desired product. (2 Words)
3.A reaction that takes in more energy than it gives out.
4.A form of carbon in which the atoms all form four bonds.
6.Formed when atoms share electrons. (2 Words)
7.The simplest ratio formula of a compound. (2 Words)
8.The name given to attractions between molecules. (2 Words)
9.A reaction in which the products of a 'forward' reaction can react 'backwards' to reform the original reactants.
12.An explanation of how particles behave and how this affects the rate of chemical reactions. (2 Words)
14.An insoluble product formed by the combination of soluble reactants.
16.A biological molecule, usually protein, that will speed up specific chemical reactions.
17.A form of carbon in which the atoms form three bonds.

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